polysialic acid

polysialic acid
Potential regulator of cell-cell interactions. Polysialic acid chains in glycoproteins may have negative regulatory effects on cell-cell contact. Thus the low PSA form of NCAM is thought to promote cell-cell contact and enhance fasciculation whereas NCAM with a high PSA content is thought to prevent close membrane-membrane apposition.

Dictionary of molecular biology. 2004.

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